The general commanding the Union Army of the Potomac George G. Meade, won at Gettysburg.
Another general and a colonel "saved the battle" for the Union. One was General G. K. Warren who discovered the Round Tops were vacant and recognized the peril the Union line would be in if the Confederates were able to post troops and cannon on them. The other was Colonel Joshua Chamberlain of the 20th Maine Volunteer Infantry. They anchored the line on Little Round Top and resisted numerous attempts to dislodge them.